【摘 要】
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Ultra-narrow gap welding (UNGW) process with high stabilization,reliability and without spatter can be achieved with constricted arc by molten slag wall,which i
【机 构】
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School of Mech-Electronic Technology
论文部分内容阅读
Ultra-narrow gap welding (UNGW) process with high stabilization,reliability and without spatter can be achieved with constricted arc by molten slag wall,which is made from melted flux.The experiments are carried out by changing voltage under different currents.The results indicate voltage range being fit for UNGW is about 22 - 31 V under the current range of 200 - 320 A.With the increasing of voltage,weld formation of UNGW has the law of lack of fusion on sidewall,good weld and undercut in turn under a certain current.In addition,the action relationships among arc,molten slag wall and sidewalls can be improved by properly adjusting voltage and current of arc,which makes cathode spot properly distribute in ultra-narrow gap.Therefore,the effective control of weld formation of UNGW has been achieved.
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